I have found this Dhanwantari Gayatri Mantra:
Om Vasudevaya Vidmahe
Vaidhyarajaya Dhimahi
Tanno Dhanvantri Prachodayat
This Mantra can be found on Internet, but also I have this book Исцеляющие мантры в Аюрведе (Russian Edition), where this Mantra is a bit different:
Om Vasudevaya Vidmahe
Djagad-rakshaya Dhimahi
Tanno Dhanvantri Prachodayat
Sorry for maybe wrong spelling as in this book Mantra is written using Cyrillic.
What is the difference between Vaidhyarajaya Dhimahi
and Djagad-rakshaya Dhimahi
? Thank you!